Smoke-box for locomotives



2 Sheets- Sheet 1.

(No Model.)

F. GANDY. SMOKE B0X FOR LoooMoTIVBs.

No. 409,033. Patented Aug. 13, 1889.

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(No Model.)

. 2 sheets-sheet 2. P. GANDY.

SMOKE BOX FOR LOGOMOTIVES.

Patented Aug. 13, 1889.` l

WTNESSES:

INI/EN TOR' l M N. PETERS, Phowumngmpher, whmgmn. D. c.

UNITED STATES PATENT OFFICE..

FREDERICK CANDY, `OF CINCINNATI, OHIO.

SMOKE-BOX FOR LOCOIVIOTIVES.

SPECIFICATION forming part of Letters Patent No. 409,033, dated August13, 1889.

Application iiled November l, 1888. Serial No. 289,700. (No model.)

To all whom. it may concern:

Be it known that I, FREDERICK GANDY, a subject of the Queen of GreatBritain, and a resident of Cincinnati, in the county of Hamilton andState of Ohio, have invented certain 'new and useful Improvements inSnicke- BoXes for Locomotives, of which the following 4is aspecification.

My invention has for its object to provide a locomotive smoke-box havingair-inlets for the admission of air to assist in the combustion ofcinders and two concentric exhaustpipes communicating with theengine-cylinders and having separate and independent nozzles, whichterminate in open mouths on the same horizontal plane for the purpose`of maintaining a uniform draft, relieving the engine of back-pressure,and promoting a perfeet combustion of the cinders, so that they will notgain access to the smoke-stack.

Figure 1 is a longitudinal vertical section of a locomotive smoke-boxand boiler with my improvements attached. Fig. 2 is a transverse sectionon line @c cc, Fig. 1. Fig. 3 is a transverse section on line y y,Fig. 1. Fig. 4L is a central vertical section of my improvedexhaust-pipes and nozzle. Fig. 5 is a central transverse section of Fig.4.. Fig. 6^ is a horizontal cross-section on line b b, Fig. 5. Fig. 7 isa similar section on line u. a, Fig. 5. Fig. S is a section on line c c,Fig. 5.

1 represents the shell of an ordinary boiler, 2 tubular lues, and 3 thedry-steam feed-'pipe projecting into the smoke-box 4. 5 represents thesteam-pipe divided into two branches 5', which pass down through thesmoke-box for conveying steam to the steam chest and cylinders. Theseparts are of the ordinary construction.

In the accompanying drawings, 6 represents the base or cylinder saddleof the exhaust and steam pipes for supporting the same directly at thebase of the smoke-box.

7 represents the interior exhaust-pipe connected by a suitable passage 8to one of the cylinders.

9 represents the exterior pipe connected by passage 10 to the oppositecylinder. The nozzles I have shown constructed of a separate piece fromthe exhaust-pipes, provided with anges 12, resting on ianges 13 on thetop of said concentric pipes. This is merelyfor convenience of adjustingdifferent-sized nozzles.

23 represents ribs. They are placed between the two pipes or passages ofthe nozzles for stifening the same and holding the inner pipe inposition.

In the present instance I have shown hollow stay-bolts 14, provided withair-orifices 15, passing centrally through said stay-bolts. These Iprovide at the bottom portion of the smoke-box, as shown by the dottedcenter, Fig. 1. may be employed to suit varied engine-services, anddifferent forms of apertures may be employed for admitting the air intothe smoke-box for burning up the cinders; but I deem this form the best.The stay-bolts perform another ofiice. Were the cinders burned by theadmission of air into a smoke-box of ordinary construction, it wouldbecome unduly heated and burn out. a water-jacket, which also suitablyheats the feed-water. This j acket-space 1G is formed by the shell 17concentrically within the shell 1S. The stay-bolts 14. and 28 supportthe two shells and form a water-heating space.

19 represents the feed-pipe from injector or pump with check-valve 30,with its inner orifice terminating within jacket 16. In order to purifythe Water and take pure water into the boiler7 I provide feed-pipes 20,which tap the top of the j acket-space 16 and connect with the bottom ofthe boiler below the fluetubes 2,by which means I accomplish tworesults: first, the pure Water is taken from the jacket 16 and suppliedto the boiler and allows the clearing or settling of the water, theimpurities passing down into the mud-drum 21, which connects with thebottom of the jacket 16, as shown in Figs. 1 and 3.

22 represents a blow-off cock for blowing out the impurities whichaccumulate in the mud-drum21 or bottom of the heating-space. The draftfrom the furnace and the consuming of cinders or carbon within thesmokebox will heat the feed-Water and materially aid in purifying thesame.

An important function is performed by the concentric exhaust-pipes inconnection with the smoke-box air-inlets-na1nely, in maintaining asteady and uniform draft,\vhile the This I avoid by,

Any desired number of apertures IOO einders are consumed with theassistance of the air admitted through the oriiices in the periphery ofthe smokesbox. If the mouths of these pipes are not on the same plane,one will oauseabaol;p1essi11eon the engine withwhieh the othercommunicates, and the draft will not be continuous and uniform, and ifthe airinlets are dispensed with there will not be a perfect combustionof the cinders, nor will the draft be so free and steady as when theair-inlets and concentric exhaustpipes are both employed.

In order that the smoke-box may be cleaned, I provide a cap 24, coveringa man-hole at the bottom of the box, which may be removed for thatpurpose. 25 represents a separate manhole for gi\f'ing access to thecenter portion of the fire-box. It is sometimes desirable to cover theinside of the smoke-box with a nonconductor of; heatsueh as Fire-elay,asbest-us, tbe-as indicated by dotted lines 2li, Fig. l; but ordinarilysueh uon-condncting material FREDERICK GANDY.

lVitnesses:

ROBERT ZAIINER, T. SnimoNs.

